Shaft end sealing device of high-viscosity medium delivery pump
Through the three-channel rotary shaft sealing structure and the design of the shaft sleeve surface spraying, the problem of high viscosity media leaking under high pressure and high temperature environments is solved, and the stable operation and wear resistance of the high viscosity media conveying pump are achieved.
Patent Information
- Application Number
- CN202422300417.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-20
AI Technical Summary
High viscosity media is prone to leakage under high pressure and high temperature environments, and the prior art is difficult to effectively seal, resulting in unstable operation of the conveying pump.
The three-channel rotary shaft seal seal structure is adopted, combining the surface spraying of the shaft sleeve and the rotary shaft seal and the pumping spiral design of the inner diameter of the shell to increase the wear resistance of the shaft sleeve and prevent the media from gathering and coking. The rotary shaft seal is separated by a partition ring to form a multi-layer seal.
It improves the sealing performance of high viscosity media, ensures the stable operation of the conveying pump under high viscosity and high pressure conditions, and extends the service life of the equipment.
Smart Images
Figure CN223152771U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of high-viscosity material medium pump equipment, in particular to a shaft end sealing device for a high-viscosity medium conveying pump. Background Art
[0002] In modern industrial production, there are more and more occasions for conveying various high-viscosity materials. Such as polycarbonate, nylon, polyester, etc. in the synthetic fiber industry; crude oil, residue oil, asphalt, lubricating grease, etc. in the petroleum refining industry; epoxy resin, phenolic resin, silicone resin, etc. in the synthetic resin industry; SBR, NBR, silicone rubber, fluororubber, etc. in the synthetic rubber industry. All these materials have very different physical and chemical properties, but they have one common feature, that is, they are all high-viscosity media with very poor fluidity.
[0003] In the continuous production process, high-viscosity melt materials need to be continuously and stably conveyed in different states, and it is necessary to isolate the materials from the outside air to avoid material oxidation.
[0004] However, high-viscosity media are usually more prone to leakage, especially in high-pressure and high-temperature environments. Summary of the Utility Model
[0005] In order to make up for the above deficiencies, the utility model provides a shaft end sealing device for a high-viscosity medium conveying pump, aiming to improve the problem that high-viscosity media are usually more prone to leakage, especially in high-pressure and high-temperature environments in the prior art.
[0006] To achieve the above object, the utility model provides the following technical solution: A shaft end sealing device for a high-viscosity medium conveying pump, including a shaft sleeve, a transmission ring is arranged outside the shaft sleeve, a set screw is arranged inside the transmission ring, a housing is arranged outside the shaft sleeve, a housing connection bolt is arranged inside the housing, a sealing gasket is arranged inside the housing, a sealing box is arranged inside the sealing gasket, a housing connection bolt is arranged inside the sealing box, a rotary shaft seal is arranged inside the sealing box, the rotary shaft seal is arranged outside the shaft sleeve, and a spacer ring one is arranged inside the rotary shaft seal.
[0007] Further, a spacer ring two is arranged inside the sealing box, a gland is arranged outside the sealing box, the gland is arranged outside the shaft sleeve, a cartridge is arranged outside the transmission ring, and a cartridge screw is arranged inside the cartridge.
[0008] Further, a gland O-ring is arranged inside the gland, a cartridge screw is arranged inside the gland, and a gland connection bolt is arranged inside the gland.
[0009] Furthermore, a gland connecting bolt is arranged inside the sealing box, and a sealing box O-ring is arranged inside the sealing box.
[0010] Furthermore, a sleeve O-ring is arranged on the inner side of the sleeve.
[0011] The utility model has the following beneficial effects:
[0012] 1. In the utility model, the surface of the matching part of the sleeve and the rotary shaft seal is sprayed to increase the wear resistance of the sleeve, and at the same time improve its surface roughness, reduce the wear on the rotary shaft seal, so as to better seal the high-viscosity medium and make the delivery pump run more safely and stably for a long time. This design is more durable to cope with the high viscosity of the medium and ensure long-term stable operation and sealing performance.
[0013] 2. In the utility model, the inner diameter of the housing of the shaft end sealing device is processed with a pumping spiral, which can pump the sealed medium in reverse to prevent the sealed medium from accumulating and coking in large quantities at the shaft sleeve, which increases the wear of the rotary shaft seal. The conventional mechanical seal structure is eliminated and three rotary shaft seals are adopted, which are separated in sequence by spacer rings. They can withstand higher viscosity and pressure and are more wear-resistant. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a front view of a shaft end sealing device for a high viscosity medium delivery pump proposed by the utility model;
[0015] Figure 2 The utility model is a cross-sectional view of a shaft end sealing device of a high-viscosity medium delivery pump.
[0016] Legend:
[0017] 1. Housing connecting bolts; 2. Shaft sleeve; 3. Housing; 4. Gasket; 5. Sealing box; 6. Spacer ring 1; 7. Rotary shaft seal; 8. Spacer ring 2; 9. Gland; 10. Transmission ring; 11. Set screw; 12. Container plate screw; 13. Container plate; 14. Gland O-ring; 15. Gland connecting bolts; 16. Sealing box O-ring; 17. Shaft sleeve O-ring. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] Reference Figure 1 and Figure 2, an embodiment provided by the present utility model: a shaft end sealing device for a high-viscosity medium transfer pump, including a shaft sleeve 2, with a drive ring 10 arranged outside the shaft sleeve 2, a set screw 11 arranged inside the drive ring 10, a housing 3 arranged outside the shaft sleeve 2, a housing connection bolt 1 arranged inside the housing 3, a gasket 4 arranged inside the housing 3, a seal box 5 arranged inside the gasket 4, a housing connection bolt 1 arranged inside the seal box 5, a rotary shaft seal 7 arranged inside the seal box 5, the rotary shaft seal 7 being arranged outside the shaft sleeve 2, a spacer ring one 6 arranged inside the rotary shaft seal 7, a spacer ring two 8 arranged inside the seal box 5, a gland 9 arranged outside the seal box 5, the gland 9 being arranged outside the shaft sleeve 2, a cartridge piece 13 arranged outside the drive ring 10, and a cartridge piece screw 12 arranged inside the cartridge piece 13.
[0020] The shaft sleeve 2 is installed with a drive ring 10, and the surface at the mating part with the rotary shaft seal 7 is spray-coated to increase the wear resistance of the shaft sleeve 2 and at the same time improve its surface roughness, reducing the wear on the rotary shaft seal 7. The inner diameter of the housing 3 is machined with a pumping spiral to reverse-pump the high-viscosity medium and prevent the medium from aggregating and coking. The seal box 5 of this shaft end sealing device is installed with two rotary shaft seals 7 separated by a spacer ring one 6, and a rotary shaft seal 7 is installed at the gland 9 and separated from the rotary shaft seal 7 at the seal box 5 by a spacer ring two 8. There are a total of three rotary shaft seals 7 for sealing, which can withstand higher viscosity and pressure and are more wear-resistant.
[0021] Refer to Figure 1 and Figure 2 , a gland O-ring 14 is arranged inside the gland 9, a cartridge piece screw 12 is arranged inside the gland 9, a gland connection bolt 15 is arranged inside the gland 9, a gland connection bolt 15 is arranged inside the seal box 5, a seal box O-ring 16 is arranged inside the seal box 5, and a shaft sleeve O-ring 17 is arranged inside the shaft sleeve 2.
[0022] The gland O-ring 14 is installed between the seal box 5 and the gland 9 and is compressed by pressure to form a seal. When the gland connection bolt 15 is tightened, the force applied by the bolt will make the gland 9 closely contact the seal box 5, thus forming an effective seal. The elasticity of the seal box O-ring 16 enables it to be compressed and fill the tiny gaps on the joint surface. The shaft sleeve O-ring 17 is located in the seal groove of the shaft sleeve 2 and contacts the shaft surface to form a seal.
[0023] Working principle: When using this device, when the shaft end sealing device is running, high-performance grease is pre-filled between the rotary shaft seals 7 on both sides of the spacer ring 1 and the shaft sleeve 2 to ensure the long-term safe operation of the rotary shaft seals 7. The lubricating medium is filled into the rotary shaft seals 7 on both sides of the spacer ring 2 through the LBI port and discharged through the LBO port to ensure the long-term safe operation of the rotary shaft seals 7 on both sides. When the shaft end sealing device is running, the pumping spiral at the inner diameter of the housing 3 continuously pumps in the reverse direction to prevent the medium from accumulating and coking, increasing the wear of the rotary shaft seals 7 and reducing their service life. At the same time, the surface of the shaft sleeve 2 where it mates with the rotary shaft seal 7 is spray-coated to increase the wear resistance of the shaft sleeve 2, improve its surface roughness, reduce the wear of the rotary shaft seal 7, and thus better seal the high-viscosity material medium, enabling the transfer pump to operate more safely and stably in the long term.
[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A shaft end sealing device for a high-viscosity medium transfer pump, comprising a shaft sleeve (2), characterized in that: A drive ring (10) is provided on the outside of the bushing (2), a set screw (11) is provided inside the drive ring (10), a housing (3) is provided on the outside of the bushing (2), a housing connection bolt (1) is provided inside the housing (3), a gasket (4) is provided on the inner side of the housing (3), a seal box (5) is provided on the inner side of the gasket (4), a housing connection bolt (1) is provided inside the seal box (5), a rotary shaft seal (7) is provided on the inner side of the seal box (5), the rotary shaft seal (7) is provided on the outside of the bushing (2), and a spacer ring one (6) is provided on the inner side of the rotary shaft seal (7).
2. The shaft end sealing device of a high-viscosity medium transfer pump according to claim 1, characterized in that: A spacer ring two (8) is provided on the inner side of the seal box (5), a gland (9) is provided on the outside of the seal box (5), the gland (9) is provided on the outside of the bushing (2), a packing piece (13) is provided on the outside of the drive ring (10), and a packing piece screw (12) is provided inside the packing piece (13).
3. The shaft end sealing device of a high-viscosity medium transfer pump according to claim 2, characterized in that: A gland O-ring (14) is provided on the inner side of the gland (9), a packing piece screw (12) is provided inside the gland (9), and a gland connection bolt (15) is provided inside the gland (9).
4. The shaft end sealing device of a high-viscosity medium transfer pump according to claim 1, characterized in that: A gland connection bolt (15) is provided inside the seal box (5), and a seal box O-ring (16) is provided on the inner side of the seal box (5).
5. The shaft end sealing device of a high-viscosity medium transfer pump according to claim 1, characterized in that: A bushing O-ring (17) is provided on the inner side of the bushing (2).